Related:

• Live by the sword, die by the long bow.
• You might cut yourself on a long sword.
• Come, Doctor! It's as easy as pie! -- The Master, 5 Doctors.
• This should be easy. -- Famous Last Word
• proof by accumulated evidence: Long and diligent search has not revealed a counterexample.
  proof by cosmology: The negation of the proposition is unimaginable or meaningless....
• In good software, the simple things should be easy, and the complicated things should be possible.
• Schmidt's Law: If you mess with a thing long enough, it'll break.
• If you mess with a thing long enough, it will break. -- Schmidt's Law
• If you play with something long enough, you will surely break it. -- Louis Zahne